Supergirl is officially joining the DCEU in Ezra Miller's upcoming The Flash film, and it likely means that big things await the Girl of Steel. One of the upcoming DC films that are currently in the works is the long-awaited feature film based on the Scarlet Speedster. While Grant Gustin has been playing the DC icon on The CW's The Flash in the Arrowverse, Barry Allen will soon be a heavy player on the big screen too. Andy Muschietti is set to helm the DCEU movie that will be loosely based on the game-changing story arc Flashpoint. When Barry goes back in time to save his mother Nora Allen from being murdered, it affects the entire universe as he returns to a present that has been completely rewritten. Several DC characters will appear alongside Miller's Flash, including Ben Affleck and Michael Keaton's respective versions of Batman.

But Muschietti recently came out with a big surprise character for The Flash as he revealed that Sasha Calle will be joining the cast as Kara Zor-El a.k.a. Supergirl. Similar to Gustin's Arrowverse show, the Last Daughter of Krypton is currently played by Melissa Benoist on The CW's Supergirl. While the series ending later this year, the Girl of Steel will soon be joining the DCEU with Calle portraying the cinematic iteration of Kal-El's famous cousin. This will be the first time a Latina actress portrays Supergirl and the second time she appears in a feature film after Helen Slater's 1984 movie. The capacity of her role is still unknown but given that over 425 actresses auditioned for the role, it's fair to say that Supergirl will be a key character in The Flash.

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However, as exciting as Supergirl's addition is to The Flash, it raises questions about what the DCEU has planned for her after Flashpoint. Given that Supergirl is such a huge DC character, there's no way she'll just appear in The Flash as a one-and-done deal. In the last few years, there have been reports about Warner Bros. developing a Supergirl movie with various updates here and there. In 2018, it was reported that the studio was considering a Supergirl film while focusing less on Henry Cavill's Superman franchise. But after 2017's Justice League, there has been a lot of restructuring at DC Films, including Supergirl being put on hold, if the 2020 rumors are true. But with Calle's casting, this bodes very well for the potential of a feature film for the Girl of Steel sometime in the near future.

Sasha Calle as Supergirl in the Flash movie.

The Flash will, most likely, be more of an introduction to her in the DCEU with perhaps a slight set-up to what her solo movie would be about. It's very possible that it'll heavily depend on how Kara is introduced to this continuity. Given that there hasn't been any indication that Cavill's Superman will show up, perhaps Supergirl factors into the story as a result of the Flashpoint event. Once the studio sees the finished product of The Flash as well as Calle's Supergirl in action, more progression will follow. But given Kara's big status in DC, Warner Bros. likely used the casting process to also find an actress that would not only be a supporting player in The Flash, but that would also star in her own franchise.

Although a Supergirl movie has more potential than ever to happen, Calle's Flash gig could also lead to a lot of different DCEU opportunities. Should a Man of Steel 2 happen, The Flash could serve as a way for the House of El cousins to finally discover each other. That would be the first time Kara and Clark would ever be in a feature film together. Should Cavill return to the Superman role, it would be a new exciting chapter for the character by discovering that he's a biological cousin on Earth. Calle's Supergirl could be used to team-up with Batgirl as Barbara Gordon also has a DCEU film in development. There are several great DCEU options for Kara and hopefully, The Flash indicates Calle's character will get to star in her own Supergirl movie too.

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